Whats the relationship between the SMTP service and Exchange?
Different versions of Exchange have different relationships with the native SMTP service. Exchange 2000 (which can only be installed on Windows 2000), uses the native Windows 2000 SMTP service. In contrast, Exchange 5.5 provides its own SMTP service, regardless of what operating system it installs on. What’s wrong with the SMTP service in Windows 2000? The SMTP service in Windows 2000 does not correctly handle a particular type of command that’s used to transfer the data comprising an incoming mail. Upon receiving such a command, the service would fail. What would this enable the attacker to do? An attacker could use this vulnerability to disrupt the operation of mail services on an affected server. How could an attacker exploit this vulnerability? The attacker would need to establish a connection with the server and send data that purports to be an incoming mail for a user on the server. If the attacker included the command at issue here within that data, the SMTP service on the syste
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